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A mainframe computer in a university crashes on the average 0.71 time in a semester.
a. What is the probability that it will crash at least two times in a given semester?
b. What is the probability that it will not crash at all in a given semester?
c. The MIS administrator wants to increase the probability of no crash at all in a semester to at least 90%. What is the largest µ that will achieve this goal?
Suppose that 1% of all the students seeking treatment at the school infirmary have mono. Of the students who do have mono, 90% complain of a sore throat. Of the students who do not have mono, 30% also have sore throats.
You have $10,000 and want to invest $4,000 in Stock A, and $6,000 in Stock B. What is expected rate of return for A? What is the variance of A
a specific automotive part that a service station stocks in its inventory has an 8 chance of being defective. suppose
With a mean of 1/μ1 minutes for major language request and a mean of 1/μ2 minutes for minor language request. what is the probability that in the next hour a total of n service requests will arrive?
1. approximately 22 of 1000 fish in a pond are infected with a skin disease. a random sample of 20 fish is selected.
mcdonalds waiting times. you want to estimate sd for the population of waiting times at mcdonalds drive up windows. you
On a questionnaire designed to measure empathy, the mean score for the general population is 30.6, random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6. What would the most..
At 0.05 level significance, is there evidence of the difference in proportion of dvds purchased on basis of the kind of media used (Mailing, E-Mail)?
1.a study was conducted to explore the relation between alcohol consumption and hypertension. 7400 nurses were surveyed
A file cabinet manufactor estimates that 5% of it's file cabinets will have drawers that close improperly. Assume a production of 120 cabinets is completed. What is the mean and the standard deviation of this distribution?
in a batch of 8000 clock radios 8 are defective. a sample of 12 clock radios is randomly selected without replacement
A marketing agency is interested in the buying habits of those who shop online versus those who shop in person. In your discussion post, address each of the following and explain your reasoning as to why you picked the specific scale:
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